Terry Vaughn (born 1 April 1973) is an American soccer referee who currently resides in Mount Vernon, Iowa. He has been a full international referee for FIFA since 2004.

Kevin Terry is a retired English-American soccer forward and referee who played professionally in the Major Indoor Soccer League, American Soccer League and United Soccer League. He spent ten seasons as a Major League Soccer and seven years as a FIFA official.

Kari Seitz (born November 2, 1970) is an American professional soccer referee and the most experienced female referee in the World (out of the male and female referees) She participated in four FIFA Women's World Cup tournaments in (1999, 2003, 2007 and 2011), as well as four Olympic soccer tournaments (2004, 2008, 2012 and 2016) and is the only referee — man or woman — to do so.

Mark William Geiger (born August 25, 1974) is an American sports administrator and former soccer referee. He is the senior director of match officials at the Professional Referee Organization (PRO), which oversees domestic referees in Major League Soccer (MLS). Geiger previously officiated in MLS and was on the FIFA International Referees List from 2008 to 2019. At the international level, Geiger refereed the 2012 Olympics; at the 2013 and 2015 CONCACAF Gold Cups; and at the 2014 and 2018 FIFA World Cups. At the 2014 World Cup, he became the first referee from the United States to officiate a knockout match at a World Cup tournament. Before becoming a full-time referee, Geiger was a high school mathematics teacher.

David Gantar (born June 27, 1975) is a Canadian soccer referee for PRO from Edmonton, Alberta. He has been a Canadian National Referee since 2004, and became a FIFA Referee in 2011. Gantar had a highly successful first year of international duty, officiating at three international tournaments — including one major tournament — and in the CONCACAF Champions League and 2014 FIFA World Cup Qualification.

Alan Kelly (born 9 April 1975) is a former FIFA Referee from the Republic of Ireland. He has officiated primarily in the Munster Senior League, the League of Ireland and Major League Soccer and was first appointed to the FIFA list in 2002. He has been regarded as Ireland's top referee for the last number of years.

Michael Kennedy (born 1961-04-16) is a soccer referee from the United States. He was a FIFA referee from 1999 to 2006, supervising several international (friendly) matches during his career.

Jair Marrufo (born June 7, 1977) is an American soccer referee. He has been a referee in Major League Soccer since 2002 and a FIFA referee since 2007.

Esfandiar Baharmast (born March 11, 1954) is a retired Iranian-American football (soccer) referee best known for supervising two matches during the 1998 FIFA World Cup held in France.

Ali Mohamed Bujsaim (Arabic: علي بوجسيم‎) (born September 9, 1959) is a retired football (soccer) referee from the United Arab Emirates, best known for supervising at three FIFA World Cups: 1994 (two matches), 1998 (three matches) and 2002 (two matches).